@everyone not hyping Giratina in this thread:
(Note how this is the same fan club that has been hyping T-tar for a while now.)
If T-tar is so good according to you guys, then Giratina LV X is way better. For starters, it has 10 more HP with Snowpoint (which you should play anyway), needs 1 less Energy, its basic has attacks that actually helps the sniping/discarding, it sends things to the Lost Zone, has a Body that is actually inevitable and will be a pain for all non-discarding decks, doesn't require more than 4 deck slots ever, and looks way cooler and more evil.
But yeah, let's just agree that Giratina is too energy-heavy, thus rendering T-tar even more useless than it already is.
Also slightly more on-topic: I think the Lost Zone is a pretty cool guy, but only because of Palkia/Dialga X G. Palkia X G is particularly good with LV MAX since you can then drop Palkia + the X in one turn, since you'd want to keep it on the Bench (to eventually send it away yourself for free space) or, in a G deck, you can attack with it as well. As for its attack, it's just Empoleon X on rails. Don't forget Energy Gain, and 3 for an 80 snipe is by no means bad. If you try to disregard that, ask yourself why you've been hyping Raichu.
Dialga G X is also an excellent tech with LV MAX for the same reason, shutting down a lot of decks. Also its attack is nicely combo'd with Energy Gain again.